人には添うてみよ馬には乗ってみよ
Meanings
1
you can't judge someone until you've spent time with them; you can't judge something until you've tried it
Proverb meaning that true understanding of a person or thing comes only through direct, sustained experience. Often used to caution against snap judgments.
As the proverb goes, 'You can't judge someone until you've spent time with them'; you won't know a person's true character until you actually live with them.
With a new job, too, it's important to first give it a try in the spirit of 'you can't judge something until you've tried it.'